 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Java Forum / General / June 2005Problem Running Application (Java + JExcel API)
I am having a problem writing a program and i am getting an error that stumps me. $ java -jar WorkApp3.jar and i get error: Exception in thread "main" java.lang.NoClassDefFoundError: jxl/read/biff/BiffException at workapp3.Main.<init>(Main.java:35) at workapp3.Main.main(Main.java:64) i also tried: $ javaw WorkApp3.jar i get a popup saying "Could not find the main class. Program will exit." when i run the program in NetBeans IDE 4.1 the program seems to run the way i want it to. I can't understand what's going on?? any help would be grateful! The Newf > I am having a problem writing a program and i am getting an error that > stumps me. > > $ java -jar WorkApp3.jar ... Does this jar have a manifest file that specifies the 'main()' class?  SignatureAndrew Thompson http://www.PhySci.org/codes/ Web & IT Help http://www.PhySci.org/ Open-source software suite http://www.1point1C.org/ Science & Technology http://www.LensEscapes.com/ Images that escape the mundane yes my manifest file is as follows: Manifest-Version: 1.0 Ant-Version: Apache Ant 1.6.2 Created-By: 1.5.0_01-b08 (Sun Microsystems Inc.) Main-Class: workapp3.Main X-COMMENT: Main-Class will be added automatically by build I have only 2 files at the moment and they are both in the workapp3 directory. the files are: 1) Main.java - which is my has my main() and will eventually have the GUI i plan to make. 2) ExcelData.java - which at the moment takes the data from an excel document and exports it to a text file(easier to work with) > I am having a problem writing a program and i am getting an error that > stumps me. [quoted text clipped - 7 lines] > at workapp3.Main.<init>(Main.java:35) > at workapp3.Main.main(Main.java:64) I had this problem before, it is not main that is missing, it is BiffException that is missing. BiffException is in jxl.jar Try putting jxl.jar in your classpath. the classpath ... that would be on the comand prompt: $ java -jar -classpath .\jxl.jar WorkApp3.jar right? if the jxl.jar and my WorkApp3.jar are both in the same directory? i still get the same error? or am i doing the classpath wrong? > the classpath ... that would be on the comand prompt: > [quoted text clipped - 4 lines] > > i still get the same error? or am i doing the classpath wrong? I can't remember the exact details but I was having classpath trouble when using the "-jar" flag. I tried a whole bunch of things and just kept banging away till it worked. Try putting the jxl.jar in your directory outside the jar file, in fact try taking all the classes out of the jar file, and using "java" instead of "java -jar" umm... I tried as you suggested....i complied my files with little trouble. but when i try to run them: $ java -classpath .\jxl.jar Main Exception in thread "main" java.lang.NoClassDefFoundError: Main but when i tried: $ java -classpath .\ Main Exception in thread "main" java.lang.NoClassDefFoundError: jxl/read/biff/BiffException at Main.<init>(Main.java:35) at Main.main(Main.java:64) so in my directory i have: ExcelData.class ExcelData.java jxl.jar Main.class Main.java I just thought of trying this while writing this response: $ java -classpath .\;.\jxl.jar Main and it worked. Thank you Joan for the idea!! now how am i able to get it so that it's all neat and tidy in a jar file, so i don't have a bunch of files lying around? and is their a way to set the classpath in the manifest file? If you put the jxl.jar in the same directory as your jar and specify "Class-Path: ./jxl.jar" in your Manifest file, you should get the effect you are looking for. Thanks it's working almost perfectly.. thanks. I hope this is my final question but I need a lot of memory to run this program. I know the command: $ java -Xms10m -Xmx100m -jar WorkApp3.jar But I was wondering if it were possible to add this to the manifest file or in the program itself so that I can just double click on the WorkApp3.jar file and it will run with the extra memory that it requires, rather then runing from dos? > the classpath ... that would be on the comand prompt: > [quoted text clipped - 4 lines] > > i still get the same error? or am i doing the classpath wrong? The -jar options and the -classpath options are incompatible. RTFM, it came with the JDK. Ray SignatureXML is the programmer's duct tape. I read the manual and i was wondering if their was a way to do the memory Allocation i need thats the not the jar. I read the manual and i was wondering if their was a way to do the memory Allocation i need thats the (-Xms10m -Xmx100m) not the jar. I Read the manual... i was wondering about the memory Allocation i need.... that the -Xms10m -Xmx100m if you didn't read the question. not the jar Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
|
Reply to this Message
|
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.